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JSON 对象中数组可以包含另外一个数组,或者另外一个 JSON 对象: 实例 myObj = { "name":"网站", "num":3, "sites": [ { "name":"Google", "info":[ "Android", "Google 搜索", "Google 翻译" ] }, { "name":"Runoob", "info":[ "菜鸟教程", "菜鸟工具", "菜鸟微信" ] }, { "name":"Taobao", "info":[ "淘宝", "网购" ] } ] } 我们可以使用 for-in 来循环访问每个数组: 实例 for (i in myObj.sites) { x += "<h1>" + myObj.sites[i].name + "</h1>"; for (j in myObj.sites[i].info) { x += myObj.sites[i].info[j] + "<br>"; } } 完整实例 <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>JS中文教程网 8939.org</title> </head> <body>
<p>循环内嵌数组</p> <p id="demo"></p>
<script> var myObj, i, j, x = ""; myObj = { "name":"网站", "num":3, "sites": [ { "name":"Google", "info":[ "Android", "Google 搜索", "Google 翻译" ] }, { "name":"Runoob", "info":[ "菜鸟教程", "菜鸟工具", "菜鸟微信" ] }, { "name":"Taobao", "info":[ "淘宝", "网购" ] } ] } for (i in myObj.sites) { x += "<h1>" + myObj.sites[i].name + "</h1>"; for (j in myObj.sites[i].info) { x += myObj.sites[i].info[j] + "<br>"; } } document.getElementById("demo").innerHTML = x; </script>
</body> </html> 效果如图8-4-3 |
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